New Jersey · Eastern Time
Jersey City, NJ Area Codes
Jersey City is served by 2 area codes (201, 551). Here's which is original, which are overlays, and how to pick one for a new local number.
Last updated June 5, 2026
Area codes serving Jersey City
Jersey City sits in New Jersey, part of the Northeast region and the Eastern Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 201, 551.
The original code is 201. As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.
How to pick an area code for a new number
When you activate a new line in Jersey City, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 201), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.
Dialing in Jersey City
Because Jersey City is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in New Jersey, visit the New Jersey area codes page.
Quick answers
Jersey City area code FAQ
What area codes does Jersey City use?
Jersey City, NJ is served by 2 area codes: 201, 551.
Which is the original Jersey City area code?
201 is the original/primary code for Jersey City; the others are overlays added later for more numbers.
Do I need to dial the area code in Jersey City?
Yes. With multiple overlapping codes, 10-digit dialing is required for every call in this area.